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Add "Download-build-farm-failed-logs-and-debugging"

testiPyqejCa 2024-10-10 16:31:38 +08:00
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Download-build-farm-failed-logs-and-debugging.-.md Normal file

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The Go project has all build failed logs storage at GCE, which you can access by the [dashboard](https://build.golang.org/).
You can download all the failed logs by `fetchlogs`.
Download `fetchlogs` by `go get golang.org/x/build/cmd/fetchlogs`
`fetchlogs` only download 300 lastest failed logs by default, which is not enough for "mystery"/"flaky" bugs.
`fetchlogs -n <the number you want>`
You may also want to take a look at
`github.com/aclements/go-misc/greplogs`. It's a useful tool by Austin
to run grep over logs fetched by fetchlogs.
Also `github.com/aclements/findflakes` can make some guesses as to when a
flaky test started failing.